From dab65ae8f5883d0bef61a092bf89bf505df85f61 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=8D=A2=E5=85=8B?= <luke.lkj@taobao.com>
Date: Sat, 24 May 2014 21:08:39 +0800
Subject: [PATCH] =?UTF-8?q?The=20ioQueue=20is=20"SERIAL"=20=EF=BC=8Cso=20"?=
 =?UTF-8?q?dispatch=5Fbarrier=5Fasync"=20is=20not=20needed.?=
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---
 SDWebImage/SDImageCache.m | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/SDWebImage/SDImageCache.m b/SDWebImage/SDImageCache.m
index 233fd5a..63ce0d9 100644
--- a/SDWebImage/SDImageCache.m
+++ b/SDWebImage/SDImageCache.m
@@ -358,7 +358,7 @@ BOOL ImageDataHasPNGPreffix(NSData *data) {
 }
 
 - (void)cleanDiskWithCompletionBlock:(void (^)())completionBlock {
-    dispatch_barrier_async(self.ioQueue, ^{
+    dispatch_async(self.ioQueue, ^{
         NSURL *diskCacheURL = [NSURL fileURLWithPath:self.diskCachePath isDirectory:YES];
         NSArray *resourceKeys = @[NSURLIsDirectoryKey, NSURLContentModificationDateKey, NSURLTotalFileAllocatedSizeKey];